* { background-image: none; } window { background-color: rgba(36, 39, 58, 0.9); } button { margin: 8px; color: #cad3f5; background-color: #363a4f; border-style: solid; border-width: 2px; background-repeat: no-repeat; background-position: center; background-size: 25%; } button:active, button:focus, button:hover { color: #8bd5ca; background-color: #24273a; outline-style: none; } #lock { background-image: image(url("icons/lock.png")); } #logout { background-image: image(url("icons/logout.png")); } #suspend { background-image: image(url("icons/suspend.png")); } #hibernate { background-image: image(url("icons/hibernate.png")); } #shutdown { background-image: image(url("icons/shutdown.png")); } #reboot { background-image: image(url("icons/reboot.png")); }